Generalized multilevel inverter topology with stacked coupled inductors

In this paper a generalized multilevel inverter topology with stacked-coupled-inductors (SCI) is proposed. It is based on two cascaded stages controlled at different switching frequencies and two stacked groups of coupled-inductors. The high-frequency stage is specific to a parallel connection of at least two groups of stacked switching cells, while the low-frequency stage is composed by a basic switching cell. The operation principle of the proposed SCI generalization is verified by numerical simulations both for single- and three-phase VSI topologies.